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What (who) is rotational velocity - definition

ANGULAR MOTION OF A STAR ABOUT ITS AXIS

Rotation of a star; Projected rotational velocity; Projected rotational velocities

Detonation velocity

CHARACTERISTIC OF EXPLOSIONS

Velocity of detonation; Detonation speed; Explosive velocity

Explosive velocity, also known as detonation velocity or velocity of detonation (VoD), is the velocity at which the shock wave front travels through a detonated explosive. Explosive velocities are always faster than the local speed of sound in the material.

https://en.wikipedia.org/wiki/Detonation_velocity

Four-velocity

ANALOGUE OF VELOCITY IN FOUR-DIMENSIONAL SPACETIME

Four velocity; Velocity Four-Vector; Velocity four-vector; 4-velocity; Four-speed; 4-speed

In physics, in particular in special relativity and general relativity, a four-velocity is a four-vector in four-dimensional spacetimeTechnically, the four-vector should be thought of as residing in the tangent space of a point in spacetime, spacetime itself being modeled as a smooth manifold. This distinction is significant in general relativity.

https://en.wikipedia.org/wiki/Four-velocity

Particle velocity

TIME DERIVATIVE OF THE SOUND PARTICLE DISPLACEMENT

Sound velocity level; Particle velocity level; Acoustic velocity; Sound particle velocity

Particle velocity is the velocity of a particle (real or imagined) in a medium as it transmits a wave. The SI unit of particle velocity is the metre per second (m/s).

https://en.wikipedia.org/wiki/Particle_velocity

Wikipedia

Stellar rotation

Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface.

The rotation of a star produces an equatorial bulge due to centrifugal force. As stars are not solid bodies, they can also undergo differential rotation. Thus the equator of the star can rotate at a different angular velocity than the higher latitudes. These differences in the rate of rotation within a star may have a significant role in the generation of a stellar magnetic field.

The magnetic field of a star interacts with the stellar wind. As the wind moves away from the star its rate of angular velocity slows. The magnetic field of the star interacts with the wind, which applies a drag to the stellar rotation. As a result, angular momentum is transferred from the star to the wind, and over time this gradually slows the star's rate of rotation.

https://en.wikipedia.org/wiki/Stellar rotation